---------------------------------------------------------- Europa-List Digest Archive --- Total Messages Posted Sat 11/03/18: 2 ---------------------------------------------------------- Today's Message Index: ---------------------- 0. 09:17 AM - Please Make A Contribution To Support Your Lists (Matt Dralle) 1. 04:39 PM - Oil siphoning Rotax 912ULS (JonathanMilbank) ________________________________ Message 0 _____________________________________ Time: 09:17:12 AM PST US From: Matt Dralle Subject: Europa-List: Please Make A Contribution To Support Your Lists Dear Listers, There is no advertising income to support the Matronics Email Lists and Forums. The operation is supported 100% by your personal Contributions during the November Fund Raiser. Please make your Contribution today to support the continued operation and upgrade of these services. You can pick up a really nice gift for making your Contribution too! You may use a Credit Card or Paypal at the Matronics Contribution Site here: http://www.matronics.com/contribution or, you can send a personal check to the following address: Matronics / Matt Dralle 581 Jeannie Way Livermore, CA 94550 Thank you in advance for your generous support! Matt Dralle Matronics Email List and Forum Administrator ________________________________ Message 1 _____________________________________ Time: 04:39:07 PM PST US Subject: Europa-List: Oil siphoning Rotax 912ULS From: "JonathanMilbank" This is probably old news to you and I'm not looking for advice or help; just passing on my observation. My engine has around 300 hours and is going just fine with four similar compressions, apparently making as much horsepower as ever. Only thing is that it has usually needed quite a lot of rotations when gurgling/burping, to push oil back into the tank. But not always! Somehow I came to realise that infrequently the oil level would stay unchanged near the top of the dipstick flat for days on end. Mostly my experience has been that the oil would sink away overnight down to about 1/8 inch below the flat, then never go lower no matter how many days passed until the next flight. It seems to me that the difference could be caused by siphoning of oil out of the tank after flight, which stops once the siphon is broken when the level in the tank gets below the end of a metal tube, perhaps? Or that the siphon can't be sustained after an air bubble from the crankcase finds its way up an oil hose? This might account for the oil generally not dropping below a certain level as seen on the dipstick, except when I choose to do the gurgling/burping after flight! Sometimes, in fact rarely, I perform the gurgling/burping around and hour after flight, say because I might have elected to top up the oil level before going home. I can only imaging that the siphoning would have been going on during that hour until I started turning the prop by hand, which in that case takes very few rotations to hear the gurgle/burp telling me that air has been pushed back up the hose. This air could prevent siphoning. Maybe the routing of my oil pipes is a little different from yours and therefore you wouldn't experience this phenomenon the same as I do. I can't swear that it always behaves this way for me, but from now on I'm going to try to remember to do the gurgling/burping about an hour after flight until I've gained enough of a history. Read this topic online here: http://forums.matronics.com/viewtopic.php?p=484345#484345 ------------------------------------------------------------------------------------- Other Matronics Email List Services ------------------------------------------------------------------------------------- Post A New Message europa-list@matronics.com UN/SUBSCRIBE http://www.matronics.com/subscription List FAQ http://www.matronics.com/FAQ/Europa-List.htm Web Forum Interface To Lists http://forums.matronics.com Matronics List Wiki http://wiki.matronics.com Full Archive Search Engine http://www.matronics.com/search 7-Day List Browse http://www.matronics.com/browse/europa-list Browse Digests http://www.matronics.com/digest/europa-list Browse Other Lists http://www.matronics.com/browse Live Online Chat! http://www.matronics.com/chat Archive Downloading http://www.matronics.com/archives Photo Share http://www.matronics.com/photoshare Other Email Lists http://www.matronics.com/emaillists Contributions http://www.matronics.com/contribution ------------------------------------------------------------------------------------- These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.